Pleasant Lake-Deep Spot
Pleasant Lake-Deep Spot in Rockingham County, New Hampshire has a water quality grade of A (Excellent). Water clarity: 24.6 ft visibility. Phosphorus: 7.5 µg/L. Chlorophyll-a (algae): 2.3 µg/L.
- Clarity
- 24.6 ft
- Type
- Mesotrophic
- Public access
- Yes
Pleasant Lake-Deep Spot is a mesotrophic lake in Rockingham County, New Hampshire. Water quality is graded A based on 2 sampling years through 2025. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 50 other monitored lakes in Rockingham County, Pleasant Lake-Deep Spot ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-07-23. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
Crystal clear, you can see 24.6 ft down. Phosphorus level: 7.5 µg/L. Chlorophyll-a: 2.3 µg/L. Trophic State Index: 34.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 24.6 ft | Not graded |
| Phosphorus | 7.5 µg/L | Good |
| Chlorophyll-a (Algae) | 2.3 µg/L | Good |
| Trophic State Index (TSI) | 34 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Pleasant Lake-Deep Spot
Compare lakeside cabins, hotels, and vacation rentals near Pleasant Lake-Deep Spot in Rockingham County, New Hampshire — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Recreation & Access
- Pleasant LakePublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing Pleasant Lake-Deep Spot
EPA Impairment Status
Pleasant Lake-Deep Spot is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK700060502-09-01 · Official waterbody report · Matched by proximity (0.2 km)
County Ranking
Ranked #1 of 51 lakes in Rockingham County
Nearby Lakes in Rockingham County
Frequently asked questions about Pleasant Lake-Deep Spot
Where is Pleasant Lake-Deep Spot?
- Pleasant Lake-Deep Spot is a lake in Rockingham County, New Hampshire. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Pleasant Lake-Deep Spot?
- Pleasant Lake-Deep Spot in Rockingham County, New Hampshire has a water quality grade of A (Excellent). Water clarity: 24.6 ft visibility. Phosphorus: 7.5 µg/L. Chlorophyll-a (algae): 2.3 µg/L.
Is Pleasant Lake-Deep Spot safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Pleasant Lake-Deep Spot has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 2.3 µg/L. Always check local health department advisories before swimming.
Are there boat ramps on Pleasant Lake-Deep Spot?
- Pleasant Lake-Deep Spot has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Pleasant Lake. Public access is listed as yes.
Explore Pleasant Lake-Deep Spot across LakeGrade
More New Hampshire Lake Rankings
Top 25 by overall water quality score
Top 25 by Secchi water clarity
Grade A/B + low algae filter
Panfish-rich, public access
Full state directory
Other Grade A Lakes in New Hampshire
Strafford County · Excellent
Merrimack County · Excellent
Belknap County · Excellent
Belknap County · Excellent
Carroll County · Excellent
Merrimack County · Excellent
Mesotrophic Lakes in New Hampshire
Where this data comes from
62 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
1111330062 samples · 2020–2025
Analytical methods
- SECCHI DISK TRANSPARENCY USING A SCOPE
- SECCHI DISK TRANSPARENCY
- 10-115-01-1 F ~ LACHAT; Total Phosphorus- Manual persulfate digest
- CHLOROPHYLL A-B-C DETERMINATION (MODIFIED)
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory